Simple as this 
I'm laying the facts 
We walked through a maze 
And we can never go back 
The passion we miss 
Because of her act 
I sing this song bitterly, bitterly 
So I reminisce of times in the past 
Don't know how we stuck 
We started falling of track 
'Cause I feel dismissed 
We're fading to black 
I sing this song miserly, miserly 
 
Now that I keep climbing 
You're losing grip 
You're far behind me 
And there's no sacrificing 
Something so simple 
How could she twist it all up 
To love it ain't rocket science 
Rocket science 
(oh-oh-oh-oh-oh-oh-oh) 
To love it ain't rocket science 
Rocket science 
 
It's simple as this 
I'm letting her know 
I'm leaving, no traffic sign can stop me on the road 
Recalling her kiss 
How could she let go 
I sing this song bitterly, bitterly 
 
How can we replace something that you erased 
You're such a criminal, criminal, criminal, criminal 
You're tearing down my roof but still I have no proof 
You're such a criminal, criminal, criminal, criminal 
 
Now that I keep climbing 
You're losing grip 
You're far behind me 
And there's no sacrificing 
Something so simple 
How could she twist it all up 
To love it ain't rocket science 
Rocket science 
(oh-oh-oh-oh-oh-oh-oh) 
To love it ain't rocket science 
Rocket science 
 
I hope you're safe and sound 
Girl, I won't be around 
You're such a criminal, criminal, criminal, criminal 
How can we replace something that you erased 
You're such a criminal, criminal, criminal, criminal 
 
Now that I keep climbing 
You're losing grip 
You're far behind me 
And there's no sacrificing 
Something so simple 
How could she twist it all up 
To love it ain't rocket science 
Rocket science 
(oh-oh-oh-oh-oh-oh-oh) 
To love it ain't rocket science 
Rocket science 
Oh-oh-oh-oh-oh-oh-oh 
(Rocket science) 
Oh-oh-oh-oh-oh-oh-oh 
(Rocket science) 
Oh-oh-oh-oh-oh-oh-oh
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